The other thing which would be useful, for those of us who can't tell a Ð (Eth) from a Ð (D with Stroke), would be a cross reference relating the various characters/key sequences with their Unicode names/numbers. (Although most of the time the supplied documentation is excellent - I wish it was a good for all software).

I will have a think about the best way to do this - the more characters you add to a keyboard, the less easy it is to manage; however, perhaps the vertical bar (|) will be a good prefix key for these combinations.

Would use of the AltGr/RAlt key be sensible for some of these? I think I would prefer it, or further use of one of the existing prefix keys ($ would seem a good candidate), to the addition of a new prefix key.

I've just added the charcaters you requested to the European Latin keyboard, version 1.0.3.

I have also added the unicode values to the documentation, just hover over the character with the mouse, and a window will appear with the Unicode value. In the next version, I may add the Unicode names...

Most of the characters have been added to the backslash (\) key - see the documentation for details.